Scavenge-air apparatus



Feb. 5,1929. 1,701,371

H. T. HERR ET AL SCAVENGE AIR APPARATUS Original Filed Marchfil, 1927 2Sheets-Sheet l WITNESSES: 'FLQ mi/EH25. at BY A.T-KasI;Y

K a. B. M ATTORNEY Feb. 5, 1929. 1,701,371

H. T. HERR ETAL SCAVENGE AIR APPARATUS Original Filed March 31, 1927 2sheets sheet 2 Y WITNESSES: F; a a 5. BY A-T-Kasley ATTORNEY l PatentedFeb. 5, 1929.

uN1TED STAT-E s PATENT OFFICE;

HERBERT T. HERB, OF MERION, AND ALEXANDER'T. KASLEY, OF MOORESyPENNSYL-VANIA, ASIGNORS TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY,

A CORPORATION-OF PENNSYLVANIA.

SGAVENGE-AIB, APPARATUS.

Substitute for applicationNo.*'179,815, filed March 31, 1927. ThisapplicatiomfiledMay 11, 1928. serial 1 Noh277,048. r

v This application is a substitute for application Serial No.'179,815filed March 31,

1927, and is an improvement upon the con-.

structionshown in the application of Henry 5 F. Schmidt, Serial No.118,257 filed June 24,

1926 and entitled Internal combustion engine and in adivisionalapplication thereof Serial No. 237,011, filed December 1,1927and entitled Internal combustion engine and genorator. Both of theaforesaid applications are assigned to the Westinghouse Electric &lilanufacturing Company.

()ur invention relates to internal combustion engine power plantapparatus, more particularly of the two-cycle type, and it has for anobject to-provide simple and effective scavenging apparatus therefor.

A further object of our invention is to provide, in connection with atwo-cycle internal combustion engine, improved blower apparatus forsupplying scavenging air to the engine.

A further object of our invention is to provide a connected two-cycleinternal combustiou engine and generator, supported by a common frame,the frame forming, with respect to the generator,a scavenge air supplychamber, which is adapted to be placed in communication with the enginecylinders, togethcr, with apparatus for'supplying air to the supplychamber including a. blower driven from the generator throughspeedincreasing gearing.

it further object of our invention is to provide a connected two-cycleinternal combustion engine and. generator installation, wherein thegenerator is driven through speed-increasing gearing from the engine,together with scavenging apparatus for the engine including a blowerdriven through speeEd-increasing gearing from the generator sha t.

rate with the engine cylinders to supply the the scavenge air supplychamber.

In our application, Serial No.'179,814,.

The frame construc- A latter with scavenging air at proper times. Thegenerator is supported by the frame con. structlon. More particularly,an object of the present invention is to provide'an engine I frame ofthis character together with a generator depending therein, thegenerator and the frame cooperating to provide a scavenge airsupplychamber for supplying air to the engine cylinders at proper times,the chamher being supplied with air from a suitable blower; and, inorder to simplify the mechanical construction and to minimize the amountof space required for an installat1on, in accordance Wltll our presentinvention, blowerappa 'atus 1s carried by thegenerator and connected bysuitable conduits to These and other objects are effected by apparatusmade in accordance with our-invention as will be apparent from thefollowing description taken in connection withthe accompanying drawings,forming a part of this application, in which? Fig. 1'is a view showingthe frame construction and the blower apparatus in sec tion and thegenerator in elevation;

Fig. 2 is a top plan View of our improved power plant apparatus; and, 1Fig. 3 a fragmentary detail sectional view showing the relationship ofengine means and frame structure.

Referring now to the drawings more in detail for a better understandingof our invention, we show, at 10, a vertically disposed prismatic ortubular frame for supporting the engine means 11, and a generator -12.The generator has a lower portion 13 which depends'within the frameconstruction and cooperates with the latter to provide a scavenge airsupply chamber 14. Blower appara- I tus is shown, at 15, for supplyingair to the chamber 14. The blower apparatus, at 15, is preferablysupported by and driven from the generator as hereinafter pointed out.

Referring first to the frame construction, this is shown moreparticularly, described and claimed in our application aforesaid, and itwill be referred to herein only in so far as may be necessary toadequately disclose the present invention. In general, the frame is madeup of outwardly ext-ending corner plates '16 Connected to side plates17, the latter plates being joined by corner gusset plates 18 and havingtransverse or horizontal plates. 19 and 20cooperating therewith.

I The upper horizontal plate 19 is'provided with an opening 21 adaptedto receive the portion 1301? the generator. This chamber is divided bythe septum wall 23 into the scavenge air supply chamber 14, alreadyreferred to, and into the generator air cooling supply chamber 24, thelatter being supplied with air b any suitable means, and air passingthere rom through the openings 25 between the elements of the generatorto cool supported by thecorner plates 16, while intermediate portionsthereof are connected to the latter.

The engine means 11, is'of the general poly hedral type and it surroundsandis prefer-.

ably supported by the frame 10. As shown, the engine means preferablyincludes cylinders 26 of the two-cycle opposed'pisto'n type, theterminal portions of the cylinders being anchor elements 27, the latterbeing connected both to the tension plates 28 and to the side plates 17.The tensioncplates 28 are connected to corner bearings 29, the cornerbearings being connected both to the corner supporting plates 16 and tothe side plates 17. In this way, a built-up structure is provided whichis highly resistant to engine working 5 forces; As the cylinders 26contain opposed pistons, such cylinders are not subjected to axialworking forces, and, therefore, the mounting for the cylinders maybemade very light.

Each of the cylinder-sis provided withscavenging air inlet openings 30supplied with air through suitable passages 31 in comniunication withthe scavenge air supply space 14, the latter space being supplied withair from the blower at 15.

The opposed pistons in the cylinders 26 are connected, byconnecting rods32", to corner crank shafts 33, carried by the bearings 29. The lowerends of the crank shafts have gears 34 secured thereto and meshing withidler gears 35, the idler gears meshing with a pinion 36 carried by thelower end of the generator rotor shaft 37. -Preferably, the

diameters of the gearelements 34 and 36 hear such relationto each otheras to result 1n a speed-increasing effect, i

The generator 1s provided, above the portion 13, with feet 37, whichrest on the top plate 19 immediately above the'side plates 17 Referringnow to the scavenging apparatus, this includes a blower driven byspeedincreasing gearing from the rotor shaft 37. To this end, wepreferably provide a housing 38 into which projects the upper end of therotor shaft 37, the latter shaft having connected thereto an internalgear 39 which meshes with idler gears 40, the latter, in turn, meshingwith a central pinion 41 connected to the runner shaft or spindle 42.The runncrshaft is supported by a thrusthearing 43 on the blower housing44, this housing having an aininlet 45 which supplies air by way ofpassages46 and 47 to the eyes 48 and 49 of the centrifugal blower formedby the runner 50 carried by the shaft 42 and by the radial diffuserhousing 51. n

The radial diffuser housing is in part preferab-ly formed by a sheetmetal construction 52 having a circular series of vanes 53 therein andbeyond the vanes the housing is provided with converging outlets 54connected by conduits 55 with the scavenge air supply chamber 14. Thepurpose of the vanes, or turbine-like blades 53, is to remove the whirlfrom air discharged by the runner so that it is directed 'to flowradially in order that its energy derived from the runner may be highlyeffective to-secure the passage thereof to -the scavenge air supplychamberand maintain pressure therein.

In order that the blower apparatus 15 may be made relatively'small, wehave shown a double provision. for increase -in speed.

First, the generator; rotor is driven from the engine crank shaftsthrough 's'pecd-increas-' ing gearing; and, second, the generator rotoris connected by speed-increasing gearing with the blower runner. blowerrunner maybe caused to operate rela- -tively much faster than acrankshaft and the size of the blower apparatus maybe made relativelyquite small.

From the foregoing, it will be apparent that the plate elements 17 18,19and 20, cooperate withthegenerator portion 13 to define an interiorchamber, which is divided by. the septum wall 23 into the upperorscavenge 7 air supply chamber 14 and into the lower'or generator coolingair supply chamber 24, the latter supplying air through the openings 25for passage upwardly between elements of the generator for cooling thelatter and final- 1y being discharged from openings 57 and 58 at the topportion of-the generator.

The generator cooling air supply chamber 24 is supplied with air fromany suitable,

- means as by the propeller blower 59 operated by the motor 60.

From the foregoing, it will be apparent that we have provided a frameconstruction for supporting two-cycle internal combustion engine meansand a generator, the frame cooperating with the 1 generator to provide aspace which is divided into an upper scavenge air supply chamber forsupplying scavenging air to .the engine cylinders and into a low- Inthis way, the i er chamber for generator cooling air, the

than if the latter operated at'engine speed,-

and whereby the blower maybe operated faster than either the generatoror the engine in order that the blower may have adequate capacity,occupy a minimum of space, and be supported by the generator. Hence, wehave provideda unitary and self-contained inter- .nal combustion engineand generator power plant with scavenging apparatus supported by singlemeans, whereby the installation 00-" cupies relatively a small amount ofspace for the power developed and finds peculiar utility in situationswhere space is limited, as, for example, with railway locomotives.

While we have shown our invention in one form, it will be obvious tothose skilled in the -art that-it is not so limited, but'is susceptibleof various other changes and modifica-' tions, without departing fromthe spirit thereof, and we desire, therefore, that only such limitationsshall be placed thereupon as are imposed by the prior art or as arespecitically set forth in the appended claims. l Vhat we claim is:

in power plant apparatus, the combination ofa generator, an enginesupporting frame surrounding a portion of the generator and cooperatingwith the latter to' provide a scavengeh ir supply chamber, internalcombustion engine' means supported by said frame, means for supplyingscavenging air from said chamber to the cylinders of the e'ngine means,and means located. exteriorly of the frame for supplying air underpressure to said chamber.

2. In power plant apparatus, the combination ofa generator, an enginesupporting frame cooperating with the generator to pro vide a scavengeair supply chamber, internal combustion engine means supported by saidframe, means for supplying scavenging air I \r k & I

from said chamber to the cylinders of the engine means, means fordriving the rotor of the generator from the engine means, and meansdriven from the generator rotor and disposed exteriorly of the frame forsupply- 'ing air under. pressure to said chamber.

3. In power plant apparatus, tllCOlIlblnZttion of a vertically disposedgenerator, avertically disposed'engine supporting frame co- 7 operatingwith the generator to provide a scavenge'air supply chamber, enginemeans surrounding and supported by said frame and including horizontallydisposed cylinders,

means for supplying scavenging air from said surrounding and supportedby thefraine and including a plurality of vertically disposed crankshafts, gearing means arranged below chamber to the cylinders, motiontransmitting nieans between the engine means and the generator, andmeans disposed above the frame and generator and operated from thegenerator for supplying air under pressureto 7 ineans for supplying airunder pressure to said chamber.

5. The combination, with an internal comiJLlStlOllengine, of a'generatordriven by the engine, a blower including a runner for supplyingscavenging air to the engine, and speed-increasing gearing between thegenerator anti the runner.

6. The combination, with an internal coinbusti-on engine including aplurality of crank shafts, of a generator, means for transmitting motionfrom the crank shaftsto the generator, and scavenging apparatus for theengine including pressuresdeveloping means driven from the generator andat a different speed therefrom. I.

T. The combination, with aninternal conibustion engine, a generator,speed-increasing gearing between the engine and the geneia tor, airptessuremleveloping and translating means foi'supplying scavenging'airto the engine, and speed-increasing gearing between I the generator andsaid last-named means.

8. in powerfiplant apparatus, the combination of vertically disposedengine-supporting means. a vertically disposed generator supported bysaid means,'said generator having a rotor provided with a shaft, enginemeans the generator for connecting the crank shafts to the rotor shaft,air pressure-developing and translatingineans forfsup'plying air to theengine cylinders, and gearing interposed between the generator rotorshaft and said lastnamed means.

9. In power plant apparatus, the combination of a vertically disposedgenerator, :1 polyhedral frame having plates cooperating with saidgenerator to provide a scavenge air supply chamber, internal combustionengine means surrounding the frame and supported therebyQmeans forsupplying scavenging air from said. chamber to the cylinders, means fortransmitting motion fRUlll the engine means to the generator. a blowerdisposed above the frame and generator and having a runner for supplyingair to said chamber, and means for transmitting motion from thegenerator" to the runner.

=10. In power plant apparatus,*the combination ofa generator, an enginesupporting" frfime cooperating with the generator to provide separatescavenging air and generator cooling air chambers, engine meanssupported by the frame, means for supplying, scavengingair'from saidscavenge air'chamber to .the engine cylinders, separateair-pressuredeveloping and translating means for supplying air to thescavenge air and generator cooler chambers, and means for transmittingenergy from the engine means to the air pressure-developing andtranslating means for the scavenge air supply chamber.

11. In power plant apparatus,'the combi- .nation of an engineframe-including a box-- like structure, a generator having a portionextending within the interior space of said I structure, a diaphragmcooperating with the generatorand with the interior of said structure'todivide the interior space of the latter into scavenge air supply andgenerator cooling air supply compartments, said generator-being providedwith openings com- .municating with the generator air cooling supplycompartment, internal combustion engine meanssupported by said frame,means for supplying scavenging air from said scavenging air supplycompartment to the cylinders of the engine means, airpressure-developing, and translating means for supplying air to thescavenging air supply compartment, and means for supplying thegenerator. cooler air supply chamber with air for passage through-thegenerator.

12. In power plant apparatus, thecombination of a supporting frame, aninternal combustion engine carried by the frame, a

generator carried by the frame, and scavenging apparatus for the engine,including a blower carried by the generator and connected theretothrough speed changing gearing.

13. In power plant apparatus, the combination of a generator, aninternal combustion engine, a frame for supporting the engine and thegenerator and providing a scavenging air supply chamber, means forsupplying scavenging air from said chamber to the engine cylinders, airpressure-developing and translating apparatus carried by the generatorfor supplying scavenging air to said chamber,.-means for transmittingmotion from the engine to the generator, and means for transmittingmotion from the generator to the air- .pressure-developing andtranslating means generator, scavenging apparatus for supply- 111gscavenging air to the cylinders'and ncluding a blower having a runneraxially aligned with the generator, and means for transmitting motionfrom the generator to the runner and for effecting a change in the speedof the rnnnerrelative to the generator.

In'power plant apparatus, the combination of a supporting frame,internal combustion engine means surrounding and supported -by theframe, a generator supported by the frame, scavenging apparatus forsupplying scavenging air to the cylinders of'the engine means lncludinga housing construction supported by the generator, a runner artween.the' upper end of the shaft and said .ranged within said housing andcarried by a I 've-rtical'shaft, a thrust bearing arranged behousing, apinion carried by the lower end of said shaft, and gearing meanscooperating with said pinion and operated by said generator. I

16. In power plant apparatus, the combination of a supporting frameproviding a scavenge air supply chamber, two-cycle internal combustionengine means carried by said frame, means for conducting scavengingairfrom said chamber to the cylinders of the enginemeans, a generatorsupported by said frame and havin a rotor shaft, means for transmittingmotion from the enginemeans to the rotor shaft, a blower for supplyingscavenging air to said chamber and including a runner,--andspeed-increasing gearing between the rotor shaft and the runner.

17. In powerplant apparatus, the combination of a vertically disposedframe, a verti- 'cally disposed generator carried by the frame,

two-cycleinternal combustion engine means carried by the frame, meansfor supplying scavenging air to the cylinders of the engine meansincludlng a blower whose runner is axially aligned with the, generator,a runner shaft connected to the runner, an internal.

gear connected to the generator, idler gears meshing with the-internalgear,-'and a pinion carried by the runner shaft and meshing withthe-idler gears.

18. In power plant apparatus, the combination of a supporting frame, agenerator supported by the frame and including a rotor.

shaft, two-cycle internal combustion engine 7 means supported by theframe, means for transmitting motion from the engine means to the rotorshaft, and means for supplying scavenging air to the cylinders of theengine means including a blower whose runner is axially aligned withsaid rotor shaft, an internal gear connected to the rotor shaft, idlergears meshing with the internal gear, and a pinion carried by the runnershaft and meshing with the idler gears.-

'19. In power plant apparatus, the combination of a frame; a generatorsupported by the frame, arranged partly within the latter v air fromsaid chamber; transmission means for interconnecting the crank shaftsand the rotor of the generator; a blower arranged and extendinthereabove, the generator 00- '1 operating wit ,the frame to provide ascavenge air supply chamber; engine means disposed abont and carried bythe frame and including cylinders and crank shafts, the cylinders beingarranged to receive scavenging air under chamber.

above .the generator, supported 'therebv, and 10 driven therefrom; andmeans for conducting pressure from the blower to sm In testimonywhereof, we have hereunto HERBERT T. HERB. ALEXANDER T. KASLEY.

subscribed our names this 10th day of May 15 1928.- i

